rust/tests/ui/packed/packed-struct-transmute.rs
2024-02-16 20:02:50 +00:00

30 lines
584 B
Rust

// This assumes the packed and non-packed structs are different sizes.
// the error points to the start of the file, not the line with the
// transmute
//@ normalize-stderr-test "\d+ bits" -> "N bits"
//@ error-pattern: cannot transmute between types of different sizes, or dependently-sized types
use std::mem;
#[repr(packed)]
struct Foo {
bar: u8,
baz: usize
}
#[derive(Debug)]
struct Oof {
rab: u8,
zab: usize
}
fn main() {
let foo = Foo { bar: 1, baz: 10 };
unsafe {
let oof: Oof = mem::transmute(foo);
println!("{:?}", oof);
}
}